Function get_opts

plugins/burrow.cpp:228–232

}

static void get_opts(lua_State *L, int idx, bool &zlevel) {
    if (lua_gettop(L) < idx)
        return;
    get_bool_field(L, idx, "zlevel", &zlevel);
}

static bool get_int_field(lua_State *L, int idx, const char *name, int16_t *dest) {
    lua_getfield(L, idx, name);